Insole bottom



FIG. 1 is a top perspective view of an insole bottom, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing the remainder of the footwear insole show unclaimed subject matter only and form no part of the claimed design. 

CLAIM The ornamental design of an insole bottom, as shown and described. 